[解析]
Dear Bob,
I'm very glad to hear from you and I'm willing to tell you something about my new school year.(点明书信目的)
At first,high school life was strange to me.(学期初心情)It took me quite a long time to get used to it,but now I have become one of the top students in my class.【高分句型一】I find I enjoy school very much.In fact,it's more fun than I expected.I'm interested in activities such as singing competitions,group dancing,sports and many others.I get along well with my classmates and I have made many friends,who are very talented and kind.【高分句型二】I love my new life.(现在的学校的生活,认识了许多新老师和新同学.)
I hope you can tell me something about your new school life.(提出要求)
Best wishes.
Yours,
Li Hua